use std::collections::HashMap;
use rand::Rng;

// 所有服务的基础错误类型
#[derive(Debug)]
pub struct ServiceError(String);

impl std::fmt::Display for ServiceError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}

// 服务管理器
pub struct ServiceManager {
    pub memory_service: std::sync::Arc<std::sync::Mutex<MemoryService>>,
    pub process_service: std::sync::Arc<std::sync::Mutex<ProcessService>>,
    pub filesystem_service: std::sync::Arc<std::sync::Mutex<FileSystemService>>,
    pub network_service: std::sync::Arc<std::sync::Mutex<NetworkService>>,
    pub graphics_service: std::sync::Arc<std::sync::Mutex<GraphicsService>>,
    pub desktop_environment: std::sync::Arc<std::sync::Mutex<DesktopEnvironment>>,
    pub shell_service: std::sync::Arc<std::sync::Mutex<ShellService>>,
    pub running: bool,
}

impl ServiceManager {
    pub fn new() -> Result<Self, ServiceError> {
        println!("初始化服务管理器");
        
        // 创建内存服务
        let memory_service = MemoryService::new(std::sync::Arc::new(()))?;
        let memory_service = std::sync::Arc::new(std::sync::Mutex::new(memory_service));
        
        // 创建进程服务（需要内存服务）
        let process_service = ProcessService::new(std::sync::Arc::new(()), memory_service.clone())?;
        let process_service = std::sync::Arc::new(std::sync::Mutex::new(process_service));
        
        // 创建其他服务
        let filesystem_service = FileSystemService::new()?;
        let filesystem_service = std::sync::Arc::new(std::sync::Mutex::new(filesystem_service));
        
        let network_service = NetworkService::new()?;
        let network_service = std::sync::Arc::new(std::sync::Mutex::new(network_service));
        
        let graphics_service = GraphicsService::new(std::sync::Arc::new(()))?;
        let graphics_service = std::sync::Arc::new(std::sync::Mutex::new(graphics_service));
        
        let desktop_environment = DesktopEnvironment::new();
        let desktop_environment = std::sync::Arc::new(std::sync::Mutex::new(desktop_environment));
        
        let shell_service = ShellService::new();
        let shell_service = std::sync::Arc::new(std::sync::Mutex::new(shell_service));
        
        Ok(Self {
            memory_service,
            process_service,
            filesystem_service,
            network_service,
            graphics_service,
            desktop_environment,
            shell_service,
            running: false,
        })
    }
    
    pub fn start_all_services(&mut self) -> Result<(), ServiceError> {
        if self.running {
            return Err(ServiceError("服务已经运行".to_string()));
        }
        
        println!("启动所有服务");
        
        // 启动内存服务
        {
            let mut mem_guard = self.memory_service.lock().map_err(|_| ServiceError("无法锁定内存服务".to_string()))?;
            mem_guard.start()?;
        }
        
        // 启动进程服务
        {
            let mut proc_guard = self.process_service.lock().map_err(|_| ServiceError("无法锁定进程服务".to_string()))?;
            proc_guard.start()?;
        }
        
        // 启动文件系统服务
        {
            let mut fs_guard = self.filesystem_service.lock().map_err(|_| ServiceError("无法锁定文件系统服务".to_string()))?;
            fs_guard.start()?;
        }
        
        // 启动网络服务
        {
            let mut net_guard = self.network_service.lock().map_err(|_| ServiceError("无法锁定网络服务".to_string()))?;
            net_guard.start()?;
        }
        
        // 启动图形服务
        {
            let mut gfx_guard = self.graphics_service.lock().map_err(|_| ServiceError("无法锁定图形服务".to_string()))?;
            gfx_guard.start()?;
        }
        
        // 启动桌面环境
        {
            let mut de_guard = self.desktop_environment.lock().map_err(|_| ServiceError("无法锁定桌面环境".to_string()))?;
            de_guard.start()?;
        }
        
        // 启动Shell服务
        {
            let mut shell_guard = self.shell_service.lock().map_err(|_| ServiceError("无法锁定Shell服务".to_string()))?;
            shell_guard.start()?;
        }
        
        self.running = true;
        println!("所有服务已成功启动");
        Ok(())
    }
    
    pub fn stop_all_services(&mut self) -> Result<(), ServiceError> {
        if !self.running {
            return Err(ServiceError("服务未运行".to_string()));
        }
        
        println!("停止所有服务");
        
        // 停止Shell服务
        {
            let mut shell_guard = self.shell_service.lock().map_err(|_| ServiceError("无法锁定Shell服务".to_string()))?;
            shell_guard.stop()?;
        }
        
        // 停止桌面环境
        {
            let mut de_guard = self.desktop_environment.lock().map_err(|_| ServiceError("无法锁定桌面环境".to_string()))?;
            de_guard.stop()?;
        }
        
        // 停止图形服务
        {
            let mut gfx_guard = self.graphics_service.lock().map_err(|_| ServiceError("无法锁定图形服务".to_string()))?;
            // 图形服务没有stop方法，跳过
        }
        
        // 停止网络服务
        {
            let mut net_guard = self.network_service.lock().map_err(|_| ServiceError("无法锁定网络服务".to_string()))?;
            net_guard.stop()?;
        }
        
        // 停止文件系统服务
        {
            let mut fs_guard = self.filesystem_service.lock().map_err(|_| ServiceError("无法锁定文件系统服务".to_string()))?;
            // 文件系统服务没有stop方法，跳过
        }
        
        // 停止进程服务
        {
            let mut proc_guard = self.process_service.lock().map_err(|_| ServiceError("无法锁定进程服务".to_string()))?;
            // 进程服务没有stop方法，跳过
        }
        
        // 停止内存服务
        {
            let mut mem_guard = self.memory_service.lock().map_err(|_| ServiceError("无法锁定内存服务".to_string()))?;
            // 内存服务没有stop方法，跳过
        }
        
        self.running = false;
        println!("所有服务已停止");
        Ok(())
    }
    
    // 获取各个服务的引用
    pub fn get_memory_service(&self) -> &std::sync::Arc<std::sync::Mutex<MemoryService>> {
        &self.memory_service
    }
    
    pub fn get_process_service(&self) -> &std::sync::Arc<std::sync::Mutex<ProcessService>> {
        &self.process_service
    }
    
    pub fn get_filesystem_service(&self) -> &std::sync::Arc<std::sync::Mutex<FileSystemService>> {
        &self.filesystem_service
    }
    
    pub fn get_network_service(&self) -> &std::sync::Arc<std::sync::Mutex<NetworkService>> {
        &self.network_service
    }
    
    pub fn get_graphics_service(&self) -> &std::sync::Arc<std::sync::Mutex<GraphicsService>> {
        &self.graphics_service
    }
    
    pub fn get_desktop_environment(&self) -> &std::sync::Arc<std::sync::Mutex<DesktopEnvironment>> {
        &self.desktop_environment
    }
    
    pub fn get_shell_service(&self) -> &std::sync::Arc<std::sync::Mutex<ShellService>> {
        &self.shell_service
    }
    
    pub fn is_running(&self) -> bool {
        self.running
    }
}

// 预导入模块
pub mod prelude {
    pub use super::{
        ServiceManager,
        MemoryService,
        ProcessService,
        FileSystemService,
        NetworkService,
        GraphicsService,
        DesktopEnvironment,
        ShellService,
        ServiceError,
        ProcessState,
        ConnectionType,
        ConnectionState,
        FsNodeType,
        DisplayMode,
        WindowConfig,
        WindowType,
    };
}

// 显示模式配置
#[derive(Debug, Clone, PartialEq)]
pub struct DisplayMode {
    pub width: u32,
    pub height: u32,
    pub refresh_rate: u32,
    pub bits_per_pixel: u32,
}

// 窗口配置
#[derive(Debug, Clone)]
pub struct WindowConfig {
    pub title: String,
    pub width: u32,
    pub height: u32,
    pub resizable: bool,
    pub fullscreen: bool,
}

// 窗口句柄
pub type WindowId = u64;

// 图形服务
pub struct GraphicsService {
    // 存储创建的窗口
    windows: HashMap<WindowId, WindowConfig>,
    // 下一个窗口ID
    next_window_id: u64,
    // 当前显示模式
    current_display_mode: DisplayMode,
    // 支持的显示模式列表
    supported_display_modes: Vec<DisplayMode>,
    // 是否启用垂直同步
    vsync_enabled: bool,
}

impl Default for GraphicsService {
    fn default() -> Self {
        Self {
            windows: HashMap::new(),
            next_window_id: 1,
            current_display_mode: DisplayMode {
                width: 1920,
                height: 1080,
                refresh_rate: 60,
                bits_per_pixel: 32,
            },
            supported_display_modes: vec![
                DisplayMode { width: 1920, height: 1080, refresh_rate: 60, bits_per_pixel: 32 },
                DisplayMode { width: 1280, height: 720, refresh_rate: 60, bits_per_pixel: 32 },
                DisplayMode { width: 1024, height: 768, refresh_rate: 60, bits_per_pixel: 32 },
            ],
            vsync_enabled: true,
        }
    }
}

impl GraphicsService {
    pub fn new(_mem_cap: std::sync::Arc<dyn std::any::Any>) -> Result<Self, ServiceError> {
        println!("初始化图形服务");
        Ok(Self::default())
    }
    
    pub fn start(&self) -> Result<(), ServiceError> {
        println!("图形服务已启动");
        Ok(())
    }
    
    /// 创建一个新窗口
    pub fn create_window(&mut self, config: WindowConfig) -> Result<WindowId, ServiceError> {
        let window_id = self.next_window_id;
        self.next_window_id += 1;
        
        self.windows.insert(window_id, config.clone());
        
        println!("创建窗口: ID={}, 标题='{}', 尺寸={}x{}, 可调整大小={}, 全屏={}",
                 window_id, config.title, config.width, config.height,
                 config.resizable, config.fullscreen);
        
        Ok(window_id)
    }
    
    /// 关闭窗口
    pub fn close_window(&mut self, window_id: WindowId) -> Result<(), ServiceError> {
        if self.windows.remove(&window_id).is_some() {
            println!("关闭窗口: ID={}", window_id);
            Ok(())
        } else {
            Err(ServiceError(format!("窗口不存在: ID={}", window_id)))
        }
    }
    
    /// 获取窗口配置
    pub fn get_window_config(&self, window_id: WindowId) -> Result<&WindowConfig, ServiceError> {
        if let Some(config) = self.windows.get(&window_id) {
            Ok(config)
        } else {
            Err(ServiceError(format!("窗口不存在: ID={}", window_id)))
        }
    }
    
    /// 调整窗口大小
    pub fn resize_window(&mut self, window_id: WindowId, width: u32, height: u32) -> Result<(), ServiceError> {
        if let Some(config) = self.windows.get_mut(&window_id) {
            if !config.resizable {
                return Err(ServiceError("窗口不可调整大小".to_string()));
            }
            
            config.width = width;
            config.height = height;
            
            println!("调整窗口大小: ID={}, 新尺寸={}x{}", window_id, width, height);
            Ok(())
        } else {
            Err(ServiceError(format!("窗口不存在: ID={}", window_id)))
        }
    }
    
    /// 切换全屏模式
    pub fn toggle_fullscreen(&mut self, window_id: WindowId) -> Result<bool, ServiceError> {
        if let Some(config) = self.windows.get_mut(&window_id) {
            config.fullscreen = !config.fullscreen;
            
            println!("切换全屏模式: ID={}, 全屏={}", window_id, config.fullscreen);
            Ok(config.fullscreen)
        } else {
            Err(ServiceError(format!("窗口不存在: ID={}", window_id)))
        }
    }
    
    /// 获取当前显示模式
    pub fn get_current_display_mode(&self) -> &DisplayMode {
        &self.current_display_mode
    }
    
    /// 设置显示模式
    pub fn set_display_mode(&mut self, mode_index: usize) -> Result<(), ServiceError> {
        if let Some(mode) = self.supported_display_modes.get(mode_index) {
            self.current_display_mode = mode.clone();
            
            println!("设置显示模式: {}x{} @ {}Hz, {} bpp",
                     mode.width, mode.height, mode.refresh_rate, mode.bits_per_pixel);
            Ok(())
        } else {
            Err(ServiceError(format!("无效的显示模式索引: {}", mode_index)))
        }
    }
    
    /// 获取支持的显示模式列表
    pub fn get_supported_display_modes(&self) -> &[DisplayMode] {
        &self.supported_display_modes
    }
    
    /// 启用或禁用垂直同步
    pub fn set_vsync(&mut self, enabled: bool) -> Result<(), ServiceError> {
        self.vsync_enabled = enabled;
        println!("{}", if enabled { "启用垂直同步" } else { "禁用垂直同步" });
        Ok(())
    }
    
    /// 检查垂直同步状态
    pub fn is_vsync_enabled(&self) -> bool {
        self.vsync_enabled
    }
    
    /// 清屏操作
    pub fn clear_screen(&self, window_id: WindowId, r: u8, g: u8, b: u8, a: u8) -> Result<(), ServiceError> {
        if !self.windows.contains_key(&window_id) {
            return Err(ServiceError(format!("窗口不存在: ID={}", window_id)));
        }
        
        println!("清屏: 窗口ID={}, 颜色=RGBA({},{},{},{})", window_id, r, g, b, a);
        Ok(())
    }
}

// 网络连接类型枚举
#[derive(Debug, PartialEq, Eq, Clone)]
pub enum ConnectionType {
    TCP,
    UDP,
    HTTP,
    HTTPS,
}

// 网络连接状态
#[derive(Debug, PartialEq, Eq, Clone)]
pub enum ConnectionState {
    Connected,
    Connecting,
    Disconnected,
    Error,
}

// 网络连接信息
#[derive(Debug)]
pub struct NetworkConnection {
    pub id: u64,
    pub connection_type: ConnectionType,
    pub state: ConnectionState,
    pub local_address: String,
    pub remote_address: String,
    pub created_time: std::time::SystemTime,
    pub last_activity_time: std::time::SystemTime,
    pub received_bytes: u64,
    pub sent_bytes: u64,
}

// 网络服务
pub struct NetworkService {
    connections: HashMap<u64, NetworkConnection>,
    next_connection_id: u64,
    network_interfaces: Vec<String>,
    is_enabled: bool,
    packet_loss_rate: f64, // 模拟丢包率
    latency: u64, // 模拟延迟（毫秒）
}

impl Default for NetworkService {
    fn default() -> Self {
        Self {
            connections: HashMap::new(),
            next_connection_id: 1,
            network_interfaces: vec!["eth0".to_string(), "wlan0".to_string()],
            is_enabled: false,
            packet_loss_rate: 0.01, // 1% 丢包率
            latency: 10, // 10ms 延迟
        }
    }
}

impl NetworkService {
    pub fn new() -> Result<Self, ServiceError> {
        println!("初始化网络服务");
        Ok(Self::default())
    }
    
    pub fn start(&mut self) -> Result<(), ServiceError> {
        if self.is_enabled {
            return Err(ServiceError("网络服务已经启动".to_string()));
        }
        
        self.is_enabled = true;
        println!("网络服务已启动. 可用接口: {:?}", self.network_interfaces);
        Ok(())
    }
    
    pub fn stop(&mut self) -> Result<(), ServiceError> {
        if !self.is_enabled {
            return Err(ServiceError("网络服务未启动".to_string()));
        }
        
        // 关闭所有连接
        for (id, conn) in self.connections.iter() {
            if conn.state == ConnectionState::Connected {
                println!("关闭连接: ID={}, 类型={:?}, 远程地址={}", 
                         id, conn.connection_type, conn.remote_address);
            }
        }
        
        self.connections.clear();
        self.is_enabled = false;
        println!("网络服务已停止");
        Ok(())
    }
    
    /// 创建网络连接
    pub fn create_connection(&mut self, 
                           conn_type: ConnectionType, 
                           remote_address: &str, 
                           port: u16) -> Result<u64, ServiceError> {
        if !self.is_enabled {
            return Err(ServiceError("网络服务未启动".to_string()));
        }
        
        let connection_id = self.next_connection_id;
        self.next_connection_id += 1;
        
        let local_port = 1024 + (connection_id % 64511); // 随机端口范围
        let local_address = format!("127.0.0.1:{}", local_port);
        let full_remote_address = format!("{}:{}", remote_address, port);
        
        // 克隆地址用于打印
        let local_address_clone = local_address.clone();
        let remote_address_clone = full_remote_address.clone();
        
        let connection = NetworkConnection {
            id: connection_id,
            connection_type: conn_type.clone(),
            state: ConnectionState::Connected, // 简化处理，直接连接成功
            local_address,
            remote_address: full_remote_address,
            created_time: std::time::SystemTime::now(),
            last_activity_time: std::time::SystemTime::now(),
            received_bytes: 0,
            sent_bytes: 0,
        };
        
        self.connections.insert(connection_id, connection);
        println!("创建连接: ID={}, 类型={:?}, 本地={}, 远程={}", 
                 connection_id, conn_type, local_address_clone, remote_address_clone);
        
        Ok(connection_id)
    }
    
    /// 关闭网络连接
    pub fn close_connection(&mut self, connection_id: u64) -> Result<(), ServiceError> {
        if let Some(connection) = self.connections.remove(&connection_id) {
            println!("关闭连接: ID={}, 类型={:?}, 远程地址={}, 发送字节={}, 接收字节={}", 
                     connection_id, connection.connection_type, connection.remote_address, 
                     connection.sent_bytes, connection.received_bytes);
            Ok(())
        } else {
            Err(ServiceError(format!("连接不存在: ID={}", connection_id)))
        }
    }
    
    /// 发送数据
    pub fn send_data(&mut self, connection_id: u64, data: &[u8]) -> Result<u64, ServiceError> {
        if !self.is_enabled {
            return Err(ServiceError("网络服务未启动".to_string()));
        }
        
        if let Some(connection) = self.connections.get_mut(&connection_id) {
            if connection.state != ConnectionState::Connected {
                return Err(ServiceError(format!("连接未建立: ID={}", connection_id)));
            }
            
            // 模拟网络条件
            let should_lose = rand::random::<f64>() < self.packet_loss_rate;
            if should_lose {
                println!("模拟丢包: 连接ID={}, 大小={} 字节", connection_id, data.len());
                return Err(ServiceError("网络丢包".to_string()));
            }
            
            // 模拟延迟
            if self.latency > 0 {
                std::thread::sleep(std::time::Duration::from_millis(self.latency));
            }
            
            let data_size = data.len() as u64;
            connection.sent_bytes += data_size;
            connection.last_activity_time = std::time::SystemTime::now();
            
            println!("发送数据: 连接ID={}, 大小={} 字节, 远程地址={}", 
                     connection_id, data_size, connection.remote_address);
            
            Ok(data_size)
        } else {
            Err(ServiceError(format!("连接不存在: ID={}", connection_id)))
        }
    }
    
    /// 接收数据
    pub fn receive_data(&mut self, connection_id: u64, max_size: u64) -> Result<Vec<u8>, ServiceError> {
        if !self.is_enabled {
            return Err(ServiceError("网络服务未启动".to_string()));
        }
        
        if let Some(connection) = self.connections.get_mut(&connection_id) {
            if connection.state != ConnectionState::Connected {
                return Err(ServiceError(format!("连接未建立: ID={}", connection_id)));
            }
            
            // 模拟网络条件
            let should_lose = rand::random::<f64>() < self.packet_loss_rate;
            if should_lose {
                println!("模拟丢包: 连接ID={}", connection_id);
                return Err(ServiceError("网络丢包".to_string()));
            }
            
            // 模拟延迟
            if self.latency > 0 {
                std::thread::sleep(std::time::Duration::from_millis(self.latency));
            }
            
            // 模拟接收到的数据
            let actual_size = std::cmp::min(max_size, 1024 * 1024) as usize; // 最大1MB
            let data = vec![rand::random::<u8>(); actual_size];
            
            connection.received_bytes += actual_size as u64;
            connection.last_activity_time = std::time::SystemTime::now();
            
            println!("接收数据: 连接ID={}, 大小={} 字节, 远程地址={}", 
                     connection_id, actual_size, connection.remote_address);
            
            Ok(data)
        } else {
            Err(ServiceError(format!("连接不存在: ID={}", connection_id)))
        }
    }
    
    /// 获取连接信息
    pub fn get_connection_info(&self, connection_id: u64) -> Result<&NetworkConnection, ServiceError> {
        if let Some(connection) = self.connections.get(&connection_id) {
            Ok(connection)
        } else {
            Err(ServiceError(format!("连接不存在: ID={}", connection_id)))
        }
    }
    
    /// 列出所有连接
    pub fn list_connections(&self) -> Vec<&NetworkConnection> {
        self.connections.values().collect()
    }
    
    /// 设置网络参数
    pub fn set_network_params(&mut self, packet_loss_rate: f64, latency: u64) -> Result<(), ServiceError> {
        if packet_loss_rate < 0.0 || packet_loss_rate > 1.0 {
            return Err(ServiceError("丢包率必须在0.0到1.0之间".to_string()));
        }
        
        self.packet_loss_rate = packet_loss_rate;
        self.latency = latency;
        
        println!("更新网络参数: 丢包率={}%, 延迟={}ms", 
                 packet_loss_rate * 100.0, latency);
        
        Ok(())
    }
    
    /// 获取连接信息
    pub fn get_connection_info(&self, connection_id: u64) -> Result<&NetworkConnection, ServiceError> {
        if let Some(connection) = self.connections.get(&connection_id) {
            Ok(connection)
        } else {
            Err(ServiceError(format!("连接不存在: ID={}", connection_id)))
        }
    }
    
    /// 列出所有连接
    pub fn list_connections(&self) -> Vec<&NetworkConnection> {
        self.connections.values().collect()
    }
    
    /// 设置网络参数
    pub fn set_network_params(&mut self, packet_loss_rate: f64, latency: u64) -> Result<(), ServiceError> {
        if packet_loss_rate < 0.0 || packet_loss_rate > 1.0 {
            return Err(ServiceError("丢包率必须在0.0到1.0之间".to_string()));
        }
        
        self.packet_loss_rate = packet_loss_rate;
        self.latency = latency;
        
        println!("更新网络参数: 丢包率={}%, 延迟={}ms", 
                 packet_loss_rate * 100.0, latency);
        
        Ok(())
    }
}

// 文件系统节点类型
#[derive(Debug, PartialEq, Eq)]
pub enum FsNodeType {
    File,
    Directory,
}

// 文件系统节点
#[derive(Debug)]
pub struct FsNode {
    pub name: String,
    pub node_type: FsNodeType,
    pub size: u64,
    pub created_time: std::time::SystemTime,
    pub modified_time: std::time::SystemTime,
    pub children: HashMap<String, FsNode>, // 仅目录使用
    pub content: Vec<u8>, // 仅文件使用
}

// 文件系统服务
pub struct FileSystemService {
    pub root: FsNode,
    pub total_size: u64,
    pub max_size: u64,
}

impl Default for FileSystemService {
    fn default() -> Self {
        let root = FsNode {
            name: "root".to_string(),
            node_type: FsNodeType::Directory,
            size: 0,
            created_time: std::time::SystemTime::now(),
            modified_time: std::time::SystemTime::now(),
            children: HashMap::new(),
            content: Vec::new(),
        };
        
        Self {
            root,
            total_size: 0,
            max_size: 1024 * 1024 * 1024 * 10, // 10GB模拟文件系统
        }
    }
}

impl FileSystemService {
    pub fn new() -> Result<Self, ServiceError> {
        println!("初始化文件系统服务: 容量 10GB");
        Ok(Self::default())
    }
    
    pub fn start(&self) -> Result<(), ServiceError> {
        println!("文件系统服务已启动");
        Ok(())
    }
    
    /// 创建目录
    pub fn create_directory(&mut self, path: &str) -> Result<(), ServiceError> {
        // 简化路径处理，只处理绝对路径
        if !path.starts_with('/') {
            return Err(ServiceError("必须使用绝对路径".to_string()));
        }
        
        let path_parts: Vec<&str> = path.split('/').filter(|p| !p.is_empty()).collect();
        
        // 查找或创建目录路径
        let mut current = &mut self.root;
        for part in &path_parts[0..path_parts.len() - 1] {
            if !current.children.contains_key(*part) {
                return Err(ServiceError(format!("路径不存在: {}", part)));
            }
            let child = current.children.get_mut(*part).unwrap();
            if child.node_type != FsNodeType::Directory {
                return Err(ServiceError(format!("{} 不是目录", part)));
            }
            current = child;
        }
        
        // 创建最终目录
        let dir_name = path_parts.last().unwrap();
        if current.children.contains_key(*dir_name) {
            return Err(ServiceError(format!("目录已存在: {}", dir_name)));
        }
        
        let new_dir = FsNode {
            name: dir_name.to_string(),
            node_type: FsNodeType::Directory,
            size: 0,
            created_time: std::time::SystemTime::now(),
            modified_time: std::time::SystemTime::now(),
            children: HashMap::new(),
            content: Vec::new(),
        };
        
        current.children.insert(dir_name.to_string(), new_dir);
        println!("创建目录: {}", path);
        
        Ok(())
    }
    
    /// 创建文件
    pub fn create_file(&mut self, path: &str) -> Result<(), ServiceError> {
        // 简化路径处理
        if !path.starts_with('/') {
            return Err(ServiceError("必须使用绝对路径".to_string()));
        }
        
        let path_parts: Vec<&str> = path.split('/').filter(|p| !p.is_empty()).collect();
        if path_parts.is_empty() {
            return Err(ServiceError("无效的文件路径".to_string()));
        }
        
        // 查找父目录
        let mut current = &mut self.root;
        for part in &path_parts[0..path_parts.len() - 1] {
            if !current.children.contains_key(*part) {
                return Err(ServiceError(format!("路径不存在: {}", part)));
            }
            let child = current.children.get_mut(*part).unwrap();
            if child.node_type != FsNodeType::Directory {
                return Err(ServiceError(format!("{} 不是目录", part)));
            }
            current = child;
        }
        
        // 创建文件
        let file_name = path_parts.last().unwrap();
        if current.children.contains_key(*file_name) {
            return Err(ServiceError(format!("文件已存在: {}", file_name)));
        }
        
        let new_file = FsNode {
            name: file_name.to_string(),
            node_type: FsNodeType::File,
            size: 0,
            created_time: std::time::SystemTime::now(),
            modified_time: std::time::SystemTime::now(),
            children: HashMap::new(),
            content: Vec::new(),
        };
        
        current.children.insert(file_name.to_string(), new_file);
        println!("创建文件: {}", path);
        
        Ok(())
    }
    
    /// 写入文件
    pub fn write_file(&mut self, path: &str, data: &[u8]) -> Result<(), ServiceError> {
        // 先检查文件系统容量，避免借用冲突
        let data_size = data.len() as u64;
        let old_size = {
            // 使用不可变引用来获取旧的文件大小
            let file_node = self.find_file_node_const(path)?;
            file_node.size
        };
        
        let size_diff = if data_size > old_size {
            data_size - old_size
        } else {
            0
        };
        
        if self.total_size + size_diff > self.max_size {
            return Err(ServiceError("文件系统空间不足".to_string()));
        }
        
        // 现在使用可变引用来更新文件内容
        let file_node = self.find_file_node(path)?;
        file_node.content.clear();
        file_node.content.extend_from_slice(data);
        file_node.size = data_size;
        file_node.modified_time = std::time::SystemTime::now();
        self.total_size += size_diff;
        
        println!("写入文件: {}, 大小={} 字节", path, data_size);
        
        Ok(())
    }
    
    /// 读取文件
    pub fn read_file(&self, path: &str) -> Result<Vec<u8>, ServiceError> {
        let file_node = self.find_file_node_const(path)?;
        
        println!("读取文件: {}, 大小={} 字节", path, file_node.size);
        
        Ok(file_node.content.clone())
    }
    
    /// 列出目录内容
    pub fn list_directory(&self, path: &str) -> Result<Vec<(String, FsNodeType, u64)>, ServiceError> {
        let dir_node = self.find_directory_node(path)?;
        
        let mut result = Vec::new();
        for (name, node) in &dir_node.children {
            result.push((name.clone(), node.node_type.clone(), node.size));
        }
        
        println!("列出目录: {}, 包含 {} 个项目", path, result.len());
        
        Ok(result)
    }
    
    /// 删除文件或目录
    pub fn delete(&mut self, path: &str) -> Result<(), ServiceError> {
        // 查找父目录和目标节点
        let path_parts: Vec<&str> = path.split('/').filter(|p| !p.is_empty()).collect();
        if path_parts.is_empty() {
            return Err(ServiceError("不能删除根目录".to_string()));
        }
        
        let mut current = &mut self.root;
        for part in &path_parts[0..path_parts.len() - 1] {
            if !current.children.contains_key(*part) {
                return Err(ServiceError(format!("路径不存在: {}", part)));
            }
            current = current.children.get_mut(*part).unwrap();
        }
        
        let node_name = path_parts.last().unwrap();
        if !current.children.contains_key(*node_name) {
            return Err(ServiceError("文件或目录不存在".to_string()));
        }
        
        let node_to_delete = current.children.remove(*node_name).unwrap();
        
        // 更新总大小
        if node_to_delete.node_type == FsNodeType::File {
            self.total_size -= node_to_delete.size;
        } else {
            // 递归计算目录大小
            self.total_size -= self.calculate_directory_size(&node_to_delete);
        }
        
        println!("删除: {}", path);
        
        Ok(())
    }
    
    // 辅助方法: 查找文件节点（可变引用）
    fn find_file_node(&mut self, path: &str) -> Result<&mut FsNode, ServiceError> {
        let path_parts: Vec<&str> = path.split('/').filter(|p| !p.is_empty()).collect();
        if path_parts.is_empty() {
            return Err(ServiceError("无效的文件路径".to_string()));
        }
        
        let mut current = &mut self.root;
        for (i, part) in path_parts.iter().enumerate() {
            if !current.children.contains_key(*part) {
                return Err(ServiceError(format!("路径不存在: {}", part)));
            }
            
            let child = current.children.get_mut(*part).unwrap();
            if i == path_parts.len() - 1 {
                // 最后一个部分应该是文件
                if child.node_type != FsNodeType::File {
                    return Err(ServiceError(format!("{} 不是文件", part)));
                }
                return Ok(child);
            } else {
                // 中间部分应该是目录
                if child.node_type != FsNodeType::Directory {
                    return Err(ServiceError(format!("{} 不是目录", part)));
                }
                current = child;
            }
        }
        
        unreachable!()
    }
    
    // 辅助方法: 查找文件节点（不可变引用）
    fn find_file_node_const(&self, path: &str) -> Result<&FsNode, ServiceError> {
        let path_parts: Vec<&str> = path.split('/').filter(|p| !p.is_empty()).collect();
        if path_parts.is_empty() {
            return Err(ServiceError("无效的文件路径".to_string()));
        }
        
        let mut current = &self.root;
        for (i, part) in path_parts.iter().enumerate() {
            if !current.children.contains_key(*part) {
                return Err(ServiceError(format!("路径不存在: {}", part)));
            }
            
            let child = current.children.get(*part).unwrap();
            if i == path_parts.len() - 1 {
                // 最后一个部分应该是文件
                if child.node_type != FsNodeType::File {
                    return Err(ServiceError(format!("{} 不是文件", part)));
                }
                return Ok(child);
            } else {
                // 中间部分应该是目录
                if child.node_type != FsNodeType::Directory {
                    return Err(ServiceError(format!("{} 不是目录", part)));
                }
                current = child;
            }
        }
        
        unreachable!()
    }
    
    // 辅助方法: 查找目录节点
    fn find_directory_node(&self, path: &str) -> Result<&FsNode, ServiceError> {
        let path_parts: Vec<&str> = path.split('/').filter(|p| !p.is_empty()).collect();
        
        let mut current = &self.root;
        for part in path_parts {
            if !current.children.contains_key(part) {
                return Err(ServiceError(format!("路径不存在: {}", part)));
            }
            
            let child = current.children.get(part).unwrap();
            if child.node_type != FsNodeType::Directory {
                return Err(ServiceError(format!("{} 不是目录", part)));
            }
            current = child;
        }
        
        Ok(current)
    }
    
    // 辅助方法: 计算目录大小
    fn calculate_directory_size(&self, dir_node: &FsNode) -> u64 {
        let mut size = 0;
        
        for (_, node) in &dir_node.children {
            if node.node_type == FsNodeType::File {
                size += node.size;
            } else {
                size += self.calculate_directory_size(node);
            }
        }
        
        size
    }
}

// 进程状态枚举
#[derive(Debug, PartialEq, Eq)]
pub enum ProcessState {
    Running,
    Stopped,
    Paused,
    Terminated,
}

// 进程信息结构体
#[derive(Debug)]
pub struct ProcessInfo {
    pub pid: u32,
    pub name: String,
    pub state: ProcessState,
    pub memory_usage: usize,
    pub created_time: std::time::SystemTime,
    pub command: String,
}

// 进程服务
pub struct ProcessService {
    pub processes: HashMap<u32, ProcessInfo>,
    pub next_pid: u32,
    pub mem_service: std::sync::Arc<std::sync::Mutex<MemoryService>>,
}

impl ProcessService {
    pub fn new(_cpu_cap: std::sync::Arc<dyn std::any::Any>, 
               mem_service: std::sync::Arc<std::sync::Mutex<MemoryService>>) -> Result<Self, ServiceError> {
        println!("初始化进程服务");
        Ok(Self {
            processes: HashMap::new(),
            next_pid: 1000,
            mem_service,
        })
    }
    
    pub fn start(&self) -> Result<(), ServiceError> {
        println!("进程服务已启动");
        Ok(())
    }
    
    /// 创建新进程
    pub fn create_process(&mut self, name: &str, command: &str, memory_size: usize) -> Result<u32, ServiceError> {
        // 分配进程内存
        let mut mem_guard = self.mem_service.lock().map_err(|_| ServiceError("无法锁定内存服务".to_string()))?;
        let mem_ptr = mem_guard.allocate(memory_size)?;
        drop(mem_guard); // 释放锁
        
        let pid = self.next_pid;
        self.next_pid += 1;
        
        let process = ProcessInfo {
            pid,
            name: name.to_string(),
            state: ProcessState::Running,
            memory_usage: memory_size,
            created_time: std::time::SystemTime::now(),
            command: command.to_string(),
        };
        
        self.processes.insert(pid, process);
        println!("创建进程: PID={}, 名称={}, 命令={}, 分配内存={} 字节", 
                 pid, name, command, memory_size);
        
        Ok(pid)
    }
    
    /// 终止进程
    pub fn terminate_process(&mut self, pid: u32) -> Result<(), ServiceError> {
        if let Some(process) = self.processes.remove(&pid) {
            // 释放进程内存
            let mut mem_guard = self.mem_service.lock().map_err(|_| ServiceError("无法锁定内存服务".to_string()))?;
            // 这里简化处理，实际应该跟踪进程分配的所有内存块
            // mem_guard.free(process.memory_ptr)?;
            drop(mem_guard);
            
            println!("终止进程: PID={}, 名称={}", pid, process.name);
            Ok(())
        } else {
            Err(ServiceError("进程不存在".to_string()))
        }
    }
    
    /// 获取进程信息
    pub fn get_process_info(&self, pid: u32) -> Result<&ProcessInfo, ServiceError> {
        if let Some(process) = self.processes.get(&pid) {
            Ok(process)
        } else {
            Err(ServiceError("进程不存在".to_string()))
        }
    }
    
    /// 暂停进程
    pub fn pause_process(&mut self, pid: u32) -> Result<(), ServiceError> {
        if let Some(process) = self.processes.get_mut(&pid) {
            if process.state == ProcessState::Running {
                process.state = ProcessState::Paused;
                println!("暂停进程: PID={}, 名称={}", pid, process.name);
            }
            Ok(())
        } else {
            Err(ServiceError("进程不存在".to_string()))
        }
    }
    
    /// 恢复进程
    pub fn resume_process(&mut self, pid: u32) -> Result<(), ServiceError> {
        if let Some(process) = self.processes.get_mut(&pid) {
            if process.state == ProcessState::Paused {
                process.state = ProcessState::Running;
                println!("恢复进程: PID={}, 名称={}", pid, process.name);
            }
            Ok(())
        } else {
            Err(ServiceError("进程不存在".to_string()))
        }
    }
    
    /// 获取所有进程列表
    pub fn list_processes(&self) -> Vec<&ProcessInfo> {
        self.processes.values().collect()
    }
}

impl std::error::Error for ServiceError {}

// 模拟内存块定义
#[derive(Debug)]
pub struct MemoryBlock {
    pub ptr: u64,
    pub size: usize,
    pub is_allocated: bool,
    pub allocated_time: std::time::SystemTime,
}

// 内存服务
pub struct MemoryService {
    pub memory_blocks: HashMap<u64, MemoryBlock>,
    pub free_memory: usize,
    pub total_memory: usize,
    pub next_ptr: u64,
}

impl Default for MemoryService {
    fn default() -> Self {
        Self {
            memory_blocks: HashMap::new(),
            free_memory: 1024 * 1024 * 1024, // 1GB模拟内存
            total_memory: 1024 * 1024 * 1024,
            next_ptr: 1000000, // 起始地址
        }
    }
}

impl MemoryService {
    pub fn new(_mem_cap: std::sync::Arc<dyn std::any::Any>) -> Result<Self, ServiceError> {
        println!("初始化内存服务: 总内存 1GB");
        Ok(Self::default())
    }
    
    pub fn start(&self) -> Result<(), ServiceError> {
        println!("内存服务已启动");
        Ok(())
    }
    
    /// 分配内存
    pub fn allocate(&mut self, size: usize) -> Result<u64, ServiceError> {
        if size > self.free_memory {
            return Err(ServiceError("内存不足".to_string()));
        }
        
        let ptr = self.next_ptr;
        self.next_ptr += size as u64;
        self.free_memory -= size;
        
        let memory_block = MemoryBlock {
            ptr,
            size,
            is_allocated: true,
            allocated_time: std::time::SystemTime::now(),
        };
        
        self.memory_blocks.insert(ptr, memory_block);
        println!("分配内存: 地址={}, 大小={} 字节, 剩余内存={} MB", 
                 ptr, size, self.free_memory / (1024 * 1024));
        
        Ok(ptr)
    }
    
    /// 释放内存
    pub fn free(&mut self, ptr: u64) -> Result<(), ServiceError> {
        if let Some(memory_block) = self.memory_blocks.remove(&ptr) {
            self.free_memory += memory_block.size;
            println!("释放内存: 地址={}, 大小={} 字节, 剩余内存={} MB", 
                     ptr, memory_block.size, self.free_memory / (1024 * 1024));
            Ok(())
        } else {
            Err(ServiceError("无效的内存地址".to_string()))
        }
    }
    
    /// 获取内存状态
    pub fn get_status(&self) -> (usize, usize) {
        (self.total_memory - self.free_memory, self.free_memory)
    }
    
    /// 写入内存
    pub fn write_memory(&self, ptr: u64, data: &[u8]) -> Result<(), ServiceError> {
        if let Some(block) = self.memory_blocks.get(&ptr) {
            if !block.is_allocated || data.len() > block.size {
                return Err(ServiceError("写入越界或内存未分配".to_string()));
            }
            // 模拟写入
            println!("写入内存: 地址={}, 数据大小={} 字节", ptr, data.len());
            Ok(())
        } else {
            Err(ServiceError("无效的内存地址".to_string()))
        }
    }
    
    /// 读取内存
    pub fn read_memory(&self, ptr: u64, size: usize) -> Result<Vec<u8>, ServiceError> {
        if let Some(block) = self.memory_blocks.get(&ptr) {
            if !block.is_allocated || size > block.size {
                return Err(ServiceError("读取越界或内存未分配".to_string()));
            }
            // 模拟读取
            let data = vec![0u8; size];
            println!("读取内存: 地址={}, 数据大小={} 字节", ptr, size);
            Ok(data)
        } else {
            Err(ServiceError("无效的内存地址".to_string()))
        }
    }
}